Apple Microarchitecture Research by Dougall Johnson

M1/A14 P-core (Firestorm): Overview | Base Instructions | SIMD and FP Instructions
M1/A14 E-core (Icestorm):  Overview | Base Instructions | SIMD and FP Instructions

FCMLE (scalar, zero, S)

Test 1: uops

Code:

  fcmle s0, s0, #0
  movi v0.16b, 1
  movi v1.16b, 2

(no loop instructions)

1000 unrolls and 1 iteration

Retires: 1.000

Issues: 1.000

Integer unit issues: 0.000

Load/store unit issues: 0.000

SIMD/FP unit issues: 1.000

retire uop (01)cycle (02)031e3f4e51schedule uop (52)schedule simd uop (54)dispatch simd uop (57)ldst uops in schedulers (5b)60696d6emap stall dispatch (70)map rewind (75)map stall (76)dispatch uop (78)map simd uop (7e)map simd uop inputs (81)8283flush restart other nonspec (84)85inst all (8c)inst simd alu (9a)l1d cache writeback (a8)accfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)f5f6f7f8fd
100420371506116862510001000100026452102018203720371571318951000100010002037203711100110000073216221786100020382038203820382038
100420371506116862510001000100026452102018203720371571318951000100010002037203711100110000073216221786100020382038203820382038
100420371506116862510001000100026452102018203720371571318951000100010002037203711100110000073216221786100020382038203820382038
100420371506116862510001000100026452102018203720371571318951000100010002037203711100110000073216221786100020382038203820382038
100420371506116862510001000100026452102018203720371571318951000100010002037203711100110000073216221786100020382038203820382038
100420371506116862510001000100026452102018203720371571318951000100010002037203711100110000073216221786100020382038203820382038
100420371506116862510001000100026452102018203720371571318951000100010002037203711100110000073216221786100020382038203820382038
100420371506116862510001000100026452102018203720371571318951000100010002037203711100110000073216221786100020382038203820382038
100420371506116862510001000100026452102018203720371571318951000100010002037203711100110000373216221786100020382038203820382038
100420371506116862510001000100026452102018203720371571318951000100010002037203711100110000073216221786100020382038203820382038

Test 2: Latency 1->2

Code:

  fcmle s0, s0, #0
  movi v0.16b, 1
  movi v1.16b, 2

(fused SUBS/B.cc loop)

100 unrolls and 100 iterations

Result (median cycles for code): 2.0037

retire uop (01)cycle (02)03181e1f3f4e51schedule uop (52)schedule int uop (53)schedule simd uop (54)dispatch int uop (56)dispatch simd uop (57)int uops in schedulers (59)ldst uops in schedulers (5b)60696d6emap stall dispatch (70)map rewind (75)map stall (76)dispatch uop (78)map int uop (7c)map simd uop (7e)map int uop inputs (7f)map simd uop inputs (81)8283flush restart other nonspec (84)85inst all (8c)inst branch (8d)inst branch taken (90)inst branch cond (94)inst int alu (97)inst simd alu (9a)9fld unit uop (a6)l1d cache writeback (a8)accfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)? int retires (ef)f5f6f7f8fd
102042003715000071196862510100100100001001000050028475211200182003720037184213187451010020010000200100002003720037111020110099100100100001000007101161119791100001002003820038200382003820038
102042003715000061196862510100100100001001000050028475211200182003720037184213187451010020010000200100002003720037111020110099100100100001000007101161119791100001002003820038200382003820038
102042003715000061196862510100100100001001000050028475211200182003720037184213187451010020010000200100002003720037111020110099100100100001000107101161119791100001002003820038200382006220038
1020420037150000399196862510100100100001001000050028475211200182003720037184213187451010020010000200100002003720037111020110099100100100001000607101161119791100001002003820038200382003820038
1020420037150000126196862510100100100001001000050028475211200182003720037184213187451010020010000200100002003720037111020110099100100100001000007101161119791100001002003820038200382003820038
1020420037150000208196862510100100100001001000050028475211200182003720037184213187451010020010000200100002003720037111020110099100100100001000007101161119791100001002003820038200382003820038
1020420037150000166196862510100100100001001000050028475211200182003720037184213187451010020010000200100002003720037111020110099100100100001000007101161119791100001002003820038200382003820038
1020420037150000103196862510100100100001001000050028475211200182003720037184213187451010020010000200100002003720037111020110099100100100001000107101161119791100001002003820038200382003820038
1020420037150000103196862510100100100001001000050028475211200182003720037184213187451010020010000200100002003720037111020110099100100100001000007101161119791100001002003820038200382003820038
102042003715000061196862510100100100001001000050028475211200182003720037184213187451010020010000200100002003720037111020110099100100100001000007101161119791100001002003820038200382003820038

1000 unrolls and 10 iterations

Result (median cycles for code): 2.0037

retire uop (01)cycle (02)031e1f3f4e51schedule uop (52)schedule int uop (53)schedule simd uop (54)dispatch int uop (56)dispatch simd uop (57)int uops in schedulers (59)ldst uops in schedulers (5b)60696d6emap stall dispatch (70)map rewind (75)map stall (76)dispatch uop (78)map int uop (7c)map simd uop (7e)map int uop inputs (7f)map simd uop inputs (81)8283flush restart other nonspec (84)85inst all (8c)inst branch (8d)inst branch taken (90)inst branch cond (94)inst int alu (97)inst simd alu (9a)9faccfd5map dispatch bubble (d6)ddfetch restart (de)e0? simd retires (ee)? int retires (ef)f5f6f7f8fd
10024200371500014519686251001010100001010000502847521120018200372003718443318767100102010000201000020037200371110021109101010000103640216231978610000102003820038200382003820038
1002420037150006119686251001010100001010000502847521020018200372003718443318767100102010000201000020037200371110021109101010000100640216231978610000102003820038200382003820038
10024200371500072619686251001010100001010000502847521020018200372003718443318767100102010000201000020037200371110021109101010000100640216221978610000102003820038200382003820038
10024200371500012619686251001010100001010000502847521020018200372003718443318767100102010000201000020037200371110021109101010000100640216231978610000102003820038200382003820038
1002420037150006119686251001010100001010000502847521020018200372003718443318767100102010000201000020037200371110021109101010000100640216231978610000102003820038200382003820038
1002420037149008219686251001010100001010000502847521020018200372003718443318767100102010000201000020037200371110021109101010000100640216221978610000102003820038200382003820038
1002420037150006119686251001010100001010000502847521020018200372003718443318767100102010000201000020037200371110021109101010000100640216221978610000102003820038200382003820038
10024200371500044119686251001010100001010000502847521020018200372003718443318767100102010000201000020037200371110021109101010000100640216221978610000102003820038200382003820038
10024200371500012619686251001010100001010000502847521020018200372003718443318767100102010000201000020037200371110021109101010000100640216221978610000102003820038200382003820038
1002420037150006119686251001010100001010000502847521020018200372003718443318767100102010000201000020037200371110021109101010000100640216231978610000102003820038200382003820038

Test 3: throughput

Count: 8

Code:

  fcmle s0, s8, #0
  fcmle s1, s8, #0
  fcmle s2, s8, #0
  fcmle s3, s8, #0
  fcmle s4, s8, #0
  fcmle s5, s8, #0
  fcmle s6, s8, #0
  fcmle s7, s8, #0
  movi v8.16b, 9

(fused SUBS/B.cc loop)

100 unrolls and 100 iterations

Result (median cycles for code divided by count): 0.2505

retire uop (01)cycle (02)03l1i tlb fill (04)1e3f51schedule uop (52)schedule int uop (53)schedule simd uop (54)dispatch int uop (56)dispatch simd uop (57)int uops in schedulers (59)ldst uops in schedulers (5b)696d6emap stall dispatch (70)map rewind (75)map stall (76)dispatch uop (78)map int uop (7c)map simd uop (7e)map int uop inputs (7f)map simd uop inputs (81)8283flush restart other nonspec (84)85inst all (8c)inst branch (8d)inst branch taken (90)inst branch cond (94)inst int alu (97)inst simd alu (9a)9fl1d cache writeback (a8)acbranch cond mispred nonspec (c5)branch mispred nonspec (cb)cdcfd5map dispatch bubble (d6)dde0? simd retires (ee)? int retires (ef)f5f6f7f8fd
80204200571501043425801081008000810080020500640132200192003820038997769989801202008003220080032200382003811802011009910010080000100001115118116020035800001002003920039200392003920039
80204200381500122925801081008000810080020500640132200192003820038997769989801202008003220080032200382003811802011009910010080000100001115118016020035800001002003920039200392003920039
80204200381500034825801081008000810080020500640132200192003820038997769989801202008003220080032200382003811802011009910010080000100001115118016020035800001002003920039200392003920039
8020420038150002925801081008000810080020500640132200192003820038997769989801202008003220080032200382003811802011009910010080000100001115118016020035800001002003920039200392003920039
80204200381500040925801081008000810080020500640132200192003820038997769989801202008003220080032200382003811802011009910010080000100001115118016020035800001002003920039200392003920039
8020420038150005225801081008000810080020500640132200192003820038997769989801202008003220080032200382003811802011009910010080000100001115118016020035800001002003920039200392003920039
8020420038150002925801081008000810080020500640132200192003820038997769989801202008003220080032200382014111802011009910010080000100001115118016020035800001002003920039200392003920039
8020420038150002925801081008000810080020500640132200192003820038997769989801202008003220080032200382003811802011009910010080000100001115118016020035800001002003920039200392008720039
8020420038150002925801081008000810080020500640132200192003820038997769989801202008003220080032200382003811802011009910010080000100001115118016020035800001002003920039200392003920039
8020420038150002925801081008000810080020500640132200192003820038997769989801202008003220080032200382003811802011009910010080000100001115118016020035800001002003920039200392003920039

1000 unrolls and 10 iterations

Result (median cycles for code divided by count): 0.2505

retire uop (01)cycle (02)03mmu table walk data (08)091e3f51schedule uop (52)schedule int uop (53)schedule simd uop (54)dispatch int uop (56)dispatch simd uop (57)int uops in schedulers (59)ldst uops in schedulers (5b)60696d6emap stall dispatch (70)map rewind (75)map stall (76)dispatch uop (78)map int uop (7c)map simd uop (7e)map int uop inputs (7f)map simd uop inputs (81)8283flush restart other nonspec (84)85inst all (8c)inst branch (8d)inst branch taken (90)inst branch cond (94)inst int alu (97)inst simd alu (9a)9fl1d tlb miss (a1)acbranch mispred nonspec (cb)cfd5map dispatch bubble (d6)dadbddfetch restart (de)e0ec? simd retires (ee)? int retires (ef)f5f6f7f8fd
8002420049150000392580010108000010800005064000012001920038200389989310011800102080000208000020038200381180021109101080000100005024116001120035080000102003920039200392003920039
8002420038150000392580010108000010800005064000012001920038200389989310011800102080000208000020038200381180021109101080000100005020116001120035080000102003920039200392003920039
8002420038150000392580010108000010800005064000012001920038200389989310011800102080000208000020038200381180021109101080000100005020116001120035080000102003920039200392003920039
8002420038150010392580010108000010800005064000012001920038200389989310011800102080000208000020038200381180021109101080000100005020116001120035080000102003920039200392003920039
8002420038150000392580010108000010800005064000012001920038200389989310011800102080000208000020038200381180021109101080000100005020116031120035080000102003920039200392003920039
8002420038150000392580010108000010800005064000012001920038200389989310011800102080000208000020038200381180021109101080000100005020116001120035080000102003920039200392003920039
8002420038150000392580010108000010800005064000012001920038200389989310011800102080000208000020038200381180021109101080000100005020116001120035080000102003920039200392003920039
8002420086150001239258001010800001080000506400001200192003820038998931001180010208000020800992003820038118002110910108000010046505020116001120035080000102003920039200922008720039
80024200991502003222580010108000010800975064000012001920038200389989310011800102080000208000020038200381180021109101080000100005020116001120035080000102003920039200392003920039
8002420038150000392580010108000010800005064000012001920038200389989310011800102080000208000020038200381180021109101080000100005020116001120035080000102003920039200392003920039